<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
	</body>
	<script type="text/javascript">
		console.log(fn());
		console.log(x);
		var x = 666;
		console.log(x);
		function fn(){
			console.log(123);
		
		}
		
		
		
		
	</script>
</html>
